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If f(theta)=|[sin^2A,cot A,1],[sin^2B,co...

If `f(theta)=|[sin^2A,cot A,1],[sin^2B,cosB,1],[sin^2C,cosC,1]|` , then (a) `t a n A+t a n B+c` (b)`cotAcotBcotC` (c)`sin^2A+sin^2B+sin^2C` (d)`0`

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